Who he was then: He was all pin-uppy before 1997, but after 1997, he exploded like a Mountain Dew in the freezer.Who he is now: Acclaimed, Oscar-nominated fancy man who only dates models, with short breaks for "Gossip Girl" stars.

Mark-Paul Gosselaar

Who he was then: Zack Morris, human charm machine and cell phone pioneer.Who he is now: Either Franklin or Bash (I watch the show and I genuinely don't remember which one he is), which is not great, but certainly fills its spot as harmlessly enjoyable TV you don't actually need to pay attention to. Plus, you know, butts.

Hanson

Who they were then:You know who they were. Don't be that guy. Also, they looked like the three lost Lisbon sisters.Who they are now: They are all married and they all have children. Even the little one. Sometimes I just like to remind you that we are old and ever down-sloping toward death.

Joey Lawrence

Who he was then: Blossom's brother who said "whoa" and had luxurious hair.Who he is now:Eyebrow tragedy.

Justin Timberlake

Who he was then: Faux-urban boybander with stupid hair.Who he is now: Frankly, not a single one of us should have seen this coming. Look at that picture. Be real.

Jason and Jeremy London

Who they were then: Cute twins.Who they are now: Fake David Fisher..and the other one.

Jonathan Taylor Thomas

Who he was then: A very small child. I forget what a very small child he was until I look at the pictures that were once plastered all over my closet door. But none of that matters because he sent me a postcard, which means ours was a forever love.Who he is now: I think he's doing that invisible acting former child stars say they are doing when they say they are "acting," but nothing's on their IMDb. But that's fine. I welcome him back upon his return to some manner of quickly canceled TNT or Fox hour-long.

Kirk Cameron

Who he was then: The adorable Mike Seaver, giver of laughs...and lessons.Who he is now: Anti-gay evangelical banana warrior.

Ryan Gosling

Who he was then: Decent, floppy haired Mouseketeer. Probably won't go too far in Hollywood, but he's kinda cute I suppose.Who he is now: Just shut it down. We have a winner.